workflows/eval: fix process job with author id argument (#408140)

Changed files
+1 -1
.github
workflows
+1 -1
.github/workflows/eval.yml
···
--arg beforeResultDir ./targetResult \
--arg afterResultDir "$(realpath prResult)" \
--arg touchedFilesJson ./touched-files.json \
-
--arg githubAuthorId "$AUTHOR_ID" \
+
--argstr githubAuthorId "$AUTHOR_ID" \
-o comparison
cat comparison/step-summary.md >> "$GITHUB_STEP_SUMMARY"